R rated sci-fi books

5467 books

Sci-fi books with mature content including explicit sex, graphic violence, or strong language. For adult readers.

The Warriors of Forever
The Warriors of Forever
Colin B. Harvey
R
The Gods of War
The Gods of War
Graham Brown; Spencer J. Andrews
R
Alien Hunter: Underworld
Alien Hunter: Underworld
Whitley Strieber
R
The Miracle Menace
The Miracle Menace
Will Murray
R
Glorious Plague
Glorious Plague
Karen Heuler
R
Admiral
Admiral
Phil Geusz
R
Roadside Picnic
Roadside Picnic
Arkady Strugatsky;Boris Strugatsky
R
Dawn of War
Dawn of War
Tim Marquitz
R
Hide and Sidhe
Hide and Sidhe
J. E. Bruce
R
Tinker's War
Tinker's War
Jamie Sedgwick
R
Dracula Who?
Dracula Who?
Ingrid Pitt
R
Day of Rebellion
Day of Rebellion
Johnny O'Brien
R
The Cobbler of Ridingham
The Cobbler of Ridingham
Jeffrey E. Barlough
R
The Clone Apocalypse
The Clone Apocalypse
Steven L. Kent
R
Seducing the Hunter
Seducing the Hunter
Vivi Anna
R
Willful Child
Willful Child
Steven Erikson
R
Loyalties
Loyalties
Patricia Barnes-Svarney
R
Cadet Kirk
Cadet Kirk
Diane Carey
R
Nocturnes in Purgatory
Nocturnes in Purgatory
Joseph Armstead
R
Jigsaw
Jigsaw
Jonathan Kellerman
R
Pariah
Pariah
Dan Abnett
R
The Lost Starship
The Lost Starship
Vaughn Heppner
R
Skull's Shadows
Skull's Shadows
David VanDyke; Ryan King
R
The Gryphon Mage
The Gryphon Mage
Richard A. Knaak
R
Lisa's War
Lisa's War
Robert Collins
R
A Fury Scorned
A Fury Scorned
Pamela Sargent; George Zebrowski
R
Atlas
Atlas
Isaac Hooke
R
Of Monsters and Mainframes
Of Monsters and Mainframes
Barbara Truelove
R
... never dream
... never dream
Scott Charles Adams
R
Geepeus
Geepeus
Nasha Poulin
R